Senate Hearing• May 21, 2025• 1:21:31

Senate Hearing on FY 2026 Budget for Atomic Energy Defense Activities and Nuclear Weapons Programs

From Senate Hearing

Senator Deb Fischer

Executive Summary

is undertaking a comprehensive modernization of its nuclear triad and supporting infrastructure in response to the growing and collaborative threats from Russia and China.
The National Nuclear Security Administration (NNSA) is executing seven simultaneous weapon modernization programs, a scale not seen since the Cold War, and is making tangible progress, such as producing the first B61-13 bomb ahead of schedule.
Significant challenges persist across the nuclear enterprise, including an aging legacy force with low readiness (e.g., 50% bomber availability), workforce shortages, NNSA hiring freezes, and industrial base constraints.
Key modernization programs like the B-21 Raider, Columbia-class submarine, and plutonium pit production are advancing, but face risks related to industrial capacity and sustained investment.

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Concerns Raised

Low aircraft availability (~50%) for the legacy bomber fleet creates an operational gap.
The defense industrial base lacks the capacity to support all modernization programs simultaneously.
Workforce challenges, including an NNSA hiring freeze and pilot retention, threaten program execution.
Russia and China are collaborating and modernizing their nuclear forces, creating a two-peer threat.
Delays in DoD submitting congressionally mandated implementation plans signal a lack of seriousness.

Opportunities Identified

Applying lessons from accelerated programs like the B61-13 to other modernization efforts.
Leveraging new technologies like the El Capitan exascale supercomputer to enhance stockpile stewardship without testing.
Fielding new, flexible capabilities like the B-21 Raider and the sea-launched cruise missile to strengthen deterrence.
Recapitalizing the NNSA production complex to create a more resilient and enduring capability for the future.

Key Themes

Geopolitical Threat Environment

The hearing frames U.S. nuclear modernization as a direct response to an increasingly dangerous security environment. Speakers repeatedly cite the "no-limits partnership" between Russia and China, both of whom are actively modernizing and diversifying their own nuclear arsenals, creating a two-peer adversary challenge for the first time.

This theme provides the fundamental justification for the massive, multi-decade investment in the U.S. nuclear enterprise, emphasizing that the goal is deterrence, not conflict.

Enterprise-Wide Modernization

The U.S. is engaged in a complete overhaul of its nuclear deterrent, encompassing all three legs of the triad (ICBMs, bombers, submarines) and the underlying NNSA infrastructure. This includes new delivery systems like the B-21 and Columbia-class submarine, new warheads like the W87-1, and recapitalizing production facilities for materials like plutonium and uranium.

The sheer scale and simultaneity of these programs create immense programmatic, budgetary, and industrial base challenges that require careful management and sustained congressional support.

Programmatic Execution and Progress

Despite the challenges, key programs are achieving significant milestones. The NNSA delivered the first B61-13 bomb a year ahead of schedule, Los Alamos produced the first new war-reserve plutonium pit, the B-21 Raider has completed its first flight, and the reactor for the first Columbia-class submarine is complete.

These successes demonstrate momentum and provide confidence that the modernization effort is yielding results, though officials caution that timelines remain tight and risks are ever-present.

Workforce and Readiness Deficits

A critical vulnerability highlighted is the strain on personnel and legacy systems. The Air Force's bomber fleet has a low availability rate of approximately 50%, NNSA faces a hiring freeze, and pilot retention is a persistent problem. These issues create a readiness gap as the military tries to sustain old systems while developing new ones.

These deficits represent a significant operational risk. Without sufficient trained personnel and a reliable legacy force, the U.S. deterrent could be weakened during the long transition to modernized systems.

Industrial Base and Infrastructure Constraints

Officials express concern about the capacity of the defense industrial base to support the simultaneous ramp-up of multiple large-scale programs. Specific bottlenecks mentioned include radiation-hardened electronics and solid rocket motors. This is compounded by the age of NNSA's own production infrastructure, which is undergoing a once-in-a-generation recapitalization.

The limited capacity of the specialized industrial base is a primary threat to meeting cost and schedule targets for critical national security programs, potentially delaying the fielding of next-generation capabilities.

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Topics

Nuclear Modernization Strategic Deterrence NNSA Department of Defense Geopolitics Russia-China Relations B61-13 B-21 Raider Columbia-Class Submarine Plutonium Pit Production Defense Industrial Base US Air Force Global Strike Command US Navy Strategic Systems Programs Workforce Development Supercomputing

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